7 scientific experiments for kids

1. tame Lizunov

Soon comes a remake of "Ghostbusters," and it is an excellent opportunity to review the old film and to explore non-Newtonian fluids. One of the characters in the film, somewhat stupid ghost Lizun - a good way to visualize. This is a character who loves to eat, and the more he is able to penetrate through walls.

We need:

• potatoes,
• tonic.

What we do

Very small (it can be ground in a food processor) cut potatoes and pour hot water. After 10-15 minutes, drain the water through a screen into a clean bowl and set aside. starch - at the bottom of the precipitate appears. Drain, starch remain in the bowl. Basically, you already get a non-Newtonian fluid. With it, you can play and watch as it hardens at hand, and itself becomes a liquid. More can add food coloring - for bright colors.

Now we will add a bit of magic.

Starch to dry (leave a couple of days). And then add to it and make such things tonic dough that is easy to take in hand. In his hands, it will retain its consistency, and if you stop and stop him knead, begin to spread.

If you turn on an ultraviolet lamp, then you and your child will see how the dough starts to glow. This is due to the quinine, which is contained in the tonic. Looks magical: shining substance that behaves as if he violates all the laws of physics.

2. Get superpowers

Comic book heroes right now are especially popular, so your child will like to feel powerful Magneto, who knows how to manage the metals.

We need:

• toner for the printer,
• magnet,
• vegetable oil.

What we do

From the start, get ready for the fact that after this experience, you need a lot of napkins or rags - will be quite messy.

The small capacity of about 50 ml pour toner for laser printers. Add two tablespoons of vegetable oil and mix well. Ready - you have in the hands of a liquid that will react to the magnet.

You can attach a magnet to the tank and watch as the liquid literally sticks to the wall, creating an amusing "hedgehog." It will be even more interesting if you find a board that is not sorry pour some black mixture, and ask the child to a magnet to direct the toner drop.

3. Turn milk cow

Encourage your child to make the liquid solid, without resorting to freezing. This is a very simple and impressive experience, though, to get a result, will have to wait a couple of days. But what effect!

We need:

• glass milk,
• vinegar.

What we do

Heat the milk glass in a microwave oven or cooker. Do not boil. Then it is necessary to add a tablespoon of vinegar. And now we begin to interfere. Actively move a spoon in a glass to see how there are white clots. This casein - a protein that is found in milk.

When the clot is much, pour the mixture through a sieve. All that will remain in a colander, you need to shake, and then put on a paper towel and a little dry. Then, begin to knead the material by hand. It will be similar to the dough or clay. At this stage, you can add food coloring or glitter to make white mass brighter and more interesting for the baby.

Encourage your child to sculpt something from this material - animal figurines (eg, a cow), or some other object. But you can just put in a lot of plastic molds. Leave to dry for a day or two.

When the mass is dry, you will figure out very hard hypoallergenic material. This "self-made plastic" used until the 1930s. From casein making jewelry, accessories, buttons.

4. manage snakes

The reaction of producing vinegar and baking soda - almost the most boring experience that you can imagine. "Volcanoes" and "pop" are not interested in modern children. But you can offer your child to become "king of the snakes," and to show how all the same to react to acid and alkali.

We need:

• Packaging jelly worms,
• soda,
• vinegar.

What we do

Take two large transparent glass. In one we pour water and pour soda. Stir. Open the package of jelly worms. It is better to cut each lengthwise to make thinner. Then the experience will be more spectacular.

Thin worms to put in a mixture of water and baking soda and stir. Set aside for 5 minutes.

In another glass pour vinegar. Now add the worms into the vessel, who had been in a glass of soda. Because of the ash on the surface will be visible bubbles. Hence, the reaction proceeds. The more worms you add in the glass, the more gas will escape. And after some time, the bubbles will raise worms to the surface. Add more soda - the reaction will be active and the worms themselves begin to get out of the cup. Cool!

5. Make a hologram as in "Star Wars"

Of course, this hologram is difficult to create at home. But her likeness - is quite real, and not even very difficult. You will learn how to use the properties of light and convert 2D-image three-dimensional image.

We need:

• smartphone,
• box from a CD,
• stationery knife,
• Scotch,
• paper,
• pencil.

What we do

On paper, you need to draw a trapezoid. The drawing can be seen in the photo: the length of the bottom side of the trapezoid - 6 cm, top - 1 cm.

Carefully cut the trapezoid of paper and reach for a box of CD. We need a transparent part of it. Attach the pattern to the plastic and using stationery knife cut plastic trapeze. Repeat three more times - we need four identical transparent element.

Now they need to be glued together with adhesive tape so as to obtain the similarity funnel or a truncated pyramid.

Take your smartphone and run it on one of the these videos. Put a plastic pyramid narrow side facing down in the center of the screen. Inside you will see a "hologram".

You can play the video with characters from the "Star Wars" and, for example, recreate Princess known recording Lei or to admire own miniature BB-8.

6. Come out dry from water

To build a sand castle on the beach will be able to each child. How about to build his under water? Along the way you will be able to explore the concept of "hydrophobic".

We need:

• colored sand for aquarium (you can take an ordinary, but it needs to be washed and dried)
• hydrophobic spray for shoes.

What we do

Carefully pour the sand on a large plate or baking sheet. Apply the spray on it hydrophobic. We do it very carefully: to spray, stir, repeat several times. Simple task - ensure that every grain of sand envelops protective layer.

When the sand is dry, reassemble it in a bottle or a package. Take a large water tank (e.g., wide-mouthed jar or aquarium). Show your child how to "work" the hydrophobic sand. If pour it into water in a thin stream, it falls to the bottom, but remains dry. It's easy to check: if the kid will take some sand from the bottom of the tank. Once the sand rises from the water, it will crumble in your hand.

7. Classification of information is better than James Bond

Write secret messages lemon juice - the last century. There is another way to get invisible ink, which also allows you to learn a little more about the reaction of iodine and starch.

We need:

• rice,
• iodine,
• paper,
• brush.

What we do

First cook rice. Porridge can be eaten later, but we need the broth - there are a lot of starch. Dip the brush in it and write on the paper the secret message, such as "I know who yesterday ate all the cookies." Wait until the paper dries. Starch letters are invisible. To decrypt the message, you need to moisten another brush or cotton swab with iodine solution and water and hold it as it is written. Because of the chemical reaction on the paper will appear blue letters. Voila!